Na2O-Nb2O5-TeO2계 유리의 광학적 성질과 나노-결정화거동 (1) |
김현규, 류봉기1, 차재민1, 김병관2, 이재성 |
포항공과대학교 화학공학과/환경공학부 1부산대학교 재료공학과 2창원대학교 화공시스템공학과 |
Nano-crystallization Behavior and Optical Properties of Na2O-Nb2O5-TeO2Glasses (1) |
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ABSTRACT |
In order to develop a new type of nonlinear optical materials or photocatlaysts, Na$_2$O-Nb$_2$ $O_{5}$-Te $O_2$ glasses were prepared using conventional melt quenching method, and the crystallization behaviors and optical properties of these glasses was investigated. The optical and physical properties for Na$_2$O-Nb$_2$ $O_{5}$-Te $O_2$ glasses are: refractive index, n=2.04$pm$0.04; density, p (g/㎤)=4.87$pm$0.58; optical energy band of the transmission cut-off wavelength, E$_{0}$ (eV)=3.14$pm$0.04. The transparent glass ceramics consisting of the nanocrysatls were obtained when the Na$_2$O-Nb$_2$ $O_{5}$-Te $O_2$ glass was first heat-treated at 3$50^{circ}C$ for 1 h and than at 40$0^{circ}C$ for 1 h. A cubic crystalline phase consisting of the nano-crysatls transforms into a stable phase at temperature above 47$0^{circ}C$ for 1 h. |
Key words:
$TeO_2$ glasses, Optical property, Glass-ceramics, Transparent Glass-ceramics, Nano-crystals |
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